It might be worth (if it's easily done) including the option directly on the "what's new" tab also. If clicking 'new posts' and you get the standard 'no new posts' message, it'd be nice to have the fall back to the most recent posts directly on the bar (not a big deal either way though, so not worth much effort, just as easy for users to default to the todays posts rather than new which provides the same basic information).